KR20010096659A - System for treating sewage and wastewater - Google Patents

Abstract

PURPOSE: This modified sequencing batch reactor(SBR) system using Bacillus sp. that is dominantly cultivated in reactor provides superior solutions for effective wastewater treatment. CONSTITUTION: In this sequencing batch reactor system, the reactor is operated by tapered aeration process in which one cycle comprises four steps; aerobic step, semi aerobic step, anoxic step and idle. In the aerobic step, up to 60-80% air is supplied and its dissolved oxygen concentration ranges from 0.7 to 1.5mg/L. In the semi aerobic step, up to 30-40% air is supplied into the reactor and its dissolved oxygen concentration ranges 0.3 to 0.5mg/L. The anoxic step after aerobic conditions plays critical role in the sludge settling efficiency. In this system, Bacillus sp., gram positive facultative anaerobe and shaped rod, is used for biological treatment of wastewater. The Bacillus sp., dominantly cultivated in separate reactor, proliferates extremely during aerobic conditions and its activity comes to be decreased as dissolved oxygen concentration down, however the number of Bacillus sp. increase until stationary phase ends up. When dissolved air in the reactor is depleted, death phase of Bacillus sp. appears. Since the Bacillus sp. could not properly survive under anaerobic condition, they transform themselves into spore, which has superior settleability to general microorganism floc. Also, for more activated condition to Bacillus sp, an agent for activating microorganisms is injected into the reactor. The agent is characterized by being formulated with SiO2, MgSO4·7H2O, CaO, FeO and trace amount of inorganic compounds.

Description

Wastewater treatment system and method {SYSTEM FOR TREATING SEWAGE AND WASTEWATER}

The present invention relates to an apparatus and method for treating sewage, and more specifically, sewage, sewage, and livestock wastewater containing organic matter and nitrogen (N) and phosphorus (P) using a single reactor such as a sequencing batch reactor (SBR). The present invention relates to a wastewater treatment apparatus and method for highly treating manure, and the like.

Most of the domestic wastewater treatment plants are secondary treatment facilities based on synthetic sludge method, which mainly removes organic matters. Nutrients such as nitrogen and phosphorus are discharged in untreated state due to their very low treatment efficiency. As it is undergoing eutrophication or sublimation, it is a big problem in terms of protecting and securing water resources. Since 1996, the government has specified and regulated the discharge standard of total nitrogen and total discharge and the discharge standard of total nitrogen and total discharge will be strengthened in the future. If applicable, in the case of Korea, sewage has a low penetration rate of the sewage pipe there is sewage exclusion method is in Combined Sewer the biological nitrogen and phosphorus removal gongbeopin A ₂ / O, technology Bardepo, SBR, etc. developed by the very low the organic concentration of the influent wastewater foreign Even though stable nutrients are difficult to remove. In addition, the principle of the technology for the removal of nitrogen has the disadvantage that the maintenance cost is high because the power cost and the additional carbon source required to nitrify the nitrogen by nitrifying the nitrogen and performing denitrification in the anoxic state. In addition, most recently developed methods are activated sludge method, mainly denitrification and dephosphorization method that can remove nitrogen and phosphorus at the same time as organic matter, but these methods are nitrogen which has emerged as a problem of the existing activated sludge method. Problems include low wine removal efficiency, high sludge generation, and poor sludge dehydration.In particular, odor problems from livestock wastewater or manure treatment using activated sludge are the most difficult problems in the operation of the treatment plant. It is emerging.

The present invention is to solve such a problem, the object of the present invention is to use a single reactor, such as SBR method, while maintaining a low maintenance cost, as well as a new type of sewage treatment apparatus and method excellent in the removal of organic matter as well as the removal of nitrogen and phosphorus. To provide.

1 is a block diagram illustrating a wastewater treatment apparatus and method according to a preferred embodiment of the present invention.

* Explanation of symbols for the main parts of the drawings

10: wastewater treatment device 20: pretreatment facility

30: flow rate adjustment tank 40: reactor

44: return pump 50: activator supply unit

60: discharge tank 70: sludge storage tank

72, 90: pump 80: dehydration unit

92: first timer 94: limit switch

96: gate 98: motor

100: second timer 110: blower

120: control unit 130: image system

According to a feature of the present invention for achieving the above object, the wastewater treatment apparatus of the present invention includes a pretreatment facility, a flow rate adjustment tank, a reaction tank, an activator supply unit, a conveying pump, and a discharge tank. The pretreatment plant removes contaminants, particulates and non-corrosive inorganics contained in the sewage to be treated. The flow regulating tank is provided with an aeration device and receives the effluent of the pretreatment facility. The reactor consists of a tank in which bacteria of the genus Bacillus are cultivated by aeration device, and the organic matter, nitrogen and phosphorus are removed by adjusting the concentration of dissolved oxygen by receiving the effluent supplied from the flow adjusting tank, and the sludge and the treated water are separated. Proceed with the process to make it possible. The activator supply unit dissolves and supplies the microorganism active agent for promoting dissolution and germination of Bacillus bacteria. The conveying pump conveys the sludge of the reaction tank to the flow rate adjusting tank. The discharge tank receives the treated water transferred from the reactor and allows the supernatant to be discharged.

Sludge storage tank for drawing excess sludge of the reaction tank in a preferred embodiment of the wastewater treatment apparatus of the present invention as described above; The dewatering sludge introduced from the sludge storage tank is discharged to the sludge cake, and a dehydration unit for transferring the filtrate generated during the dewatering to the flow rate adjustment tank may be further provided.

Such a wastewater treatment apparatus of the present invention includes, in a preferred embodiment, a first timer for counting an operation time of a pump for supplying effluent water from the flow regulating tank to the reaction tank; A limit switch for detecting the level of the reactor; A second timer for counting an operation time of a motor for opening the gate to discharge the treated water of the reactor to the outside; A control unit for controlling the concentration and dissolved time of dissolved oxygen of the reactor by inputting the respective values of the first timer, the limit switch, and the second timer to control the aeration device, the pump, and the motor of the reactor; Can be. In addition, the imaging system includes an imaging system for continuously observing the microorganisms in the reactor, the imaging system comprising: a phase contrast microscope for observing the bacteria of the genus Bacillus and other protozoa and sludge; A camera for photographing microorganisms observed by the phase contrast microscope; A video set for recording the state of microorganisms photographed by the camera; A monitor providing information about the microorganisms reproduced by said video set; It may be provided with a printer for printing information on the microorganisms displayed on the monitor.

According to another feature of the present invention for achieving the above object, the wastewater treatment method according to the present invention can be highly treated sewage, sewage, livestock wastewater, manure and the like containing organic matter, nitrogen and phosphorus using a single reactor. Make sure The wastewater treatment method includes the steps of culturing Bacillus bacteria in the reactor; Forming effluent by removing contaminants, particulates, and non-corrosive inorganic substances contained in the sewage water to be treated through a pretreatment facility; By adjusting the effluent of the pretreatment facility to a certain amount in the flow rate adjustment tank to flow into the reaction tank in which the bacteria of the Bacillus genus, the amount of air supplied to the reaction tank is gradually reduced so that the sludge and treated water as the effluent is treated. Allowing it to be separated; Dissolving and supplying a microbial active agent to promote dissolution and germination of Bacillus bacteria in the reactor; Conveying a predetermined amount of sludge from the reactor to the flow rate adjusting tank; Outflowing the treated water in the reaction tank to the discharge tank and discharges the upper water of the discharge tank to the outside.

As described above, the present invention provides an aerobic step of reducing the aeration in the reaction tank so that the concentration is 60 to 80% of the total air volume; An aerobic step of giving up to 30 to 40% of the total air volume after the exhalation step; After the micro-expiratory step may be made of an oxygen-free step that does not supply any air.

As such, the wastewater treatment method of the present invention has a concentration of 0.7 to 1.5 mg / L, 0.3 to 0.5 mg / L, and 0 mg / L in each of the aerobic, microaerobic and anaerobic stages in the preferred embodiment. Can be. The microorganism activator may be a material selected from the group consisting of silicon compounds (SiO ₂ ), magnesium compounds (MgSO ₄ ㆍ 7H ₂ O), calcium compounds (CaO), manganese compounds, iron compounds, and other trace inorganic compounds. . In addition, the step of conveying the sludge of the reaction tank to the flow rate adjustment tank may convey 1 to 3% of the sludge relative to the flow rate.

According to the wastewater treatment apparatus and method of the present invention, it is possible to remove nitrogen from the wastewater in a single reactor without nitrification, to reduce the amount of sludge and to remove odorous substances generated during the treatment process. The microorganisms in the reactor can be observed and operated in an optimal state. In addition, the process is simplified by an automatic control system having a timer and a limit switch. A feature of the present invention is to treat the wastewater by culturing Bacillus bacteria in a single reactor. In addition, the conventional SBR method proceeds in the order of mixed inflow → aerobic (aeration) → mixed inflow in anoxic state → sedimentation → discharge of treated water and sludge withdrawal, whereas the present invention maintains a high concentration of dissolved oxygen inflow of wastewater. Aerobic stage → Unexpired stage that keeps dissolved oxygen concentration lower than that of aerobic stage → Separation of sludge and treated water in anoxic state → Discharge of sludge and discharge of sludge do. By this method, Bacillus bacteria in the reaction tank is predominantly capable of effectively treating the removal efficiency of nitrogen and phosphorus as well as organic materials such as sewage and sewage, livestock wastewater and manure.

Hereinafter, a wastewater treatment apparatus and method will be described in detail with reference to FIG. 1 according to a preferred embodiment of the present invention. In the description of the preferred embodiment of the present invention, the detailed description of the various apparatuses used in the embodiment and the method of use thereof can be easily predicted, understood and implemented by those skilled in the art. In addition, the illustration of the main elements in Figure 1 is briefly or omitted, the illustration of the parts commonly known to those skilled in the art are omitted, and shown around the parts related to the present invention.

1 is a block diagram illustrating a wastewater treatment apparatus and method according to a preferred embodiment of the present invention.

Referring to Figure 1, the wastewater treatment apparatus 10 according to a preferred embodiment of the present invention is a pretreatment facility 20, the flow rate adjustment tank 30, the reaction tank 40, the activator supply unit 50, the return pump 44 , Discharge tank 60, sludge storage tank 70, dewatering unit 80, automatic control system, image system 130 and the like. The pretreatment facility 20 removes contaminants, particulates, non-corrosive inorganic substances, etc. contained in the incoming wastewater. The effluent water generated from the pretreatment facility 20 is adjusted to a certain amount in the flow adjusting tank 30 and supplied to the reaction tank 40. The aeration device (40) and the flow control device (30) are provided with aeration devices (42, 32) for supplying air from the blower (110), respectively. The effluent water of the flow rate adjusting tank 30 is supplied to the reactor 40 through the pump 90. The reaction tank 40 is composed of one tank in which Bacillus bacteria are cultured. The reactor 40 receives the effluent supplied from the flow rate adjusting tank 30 to adjust the dissolved oxygen concentration to remove organic matter, nitrogen, phosphorus, etc., and to separate the sludge and the treated water. The reactor 40 is supplied with the microbial activator dissolved in the activator supply unit 50. In addition, a part of the sludge precipitated in the reaction tank 40 is conveyed to the flow rate adjusting tank 30 by the conveying pump 44. The sludge conveyed to the flow rate adjusting tank 4 is about 1 to 3% as a ratio with respect to the treated flow rate, and the malodorous substances generated in the flow rate adjusting tank 30 and the reaction tank 40 through such conveying are caused to bacteria of the genus Bacillus. By decomposition and magnetization. The sludge in the reaction tank 40 is treated with little drawing except that the sludge is returned to the flow adjusting tank 30. And, if necessary, the excess sludge drawn by the pump 72 is dewatered to the dehydrator unit 80 through the sludge storage tank 70 and finally disposed of in the form of sludge cake, the dehydration liquid generated in the dehydration process flow rate adjustment tank Transfer to (30) and reprocess in the reaction tank (40). Then, the treated water of the reaction tank 40 is finally discharged to the supernatant water through the discharge tank (23).

The wastewater treatment apparatus 10 according to the preferred embodiment of the present invention has an automatic control system and an image system 130 to efficiently process the process. The automatic control system includes a first timer 92 for counting an operation time of the pump 90 for supplying the effluent water of the flow rate adjustment tank 30 to the reactor 40 so that the treated water of the reactor 40 is discharged to the outside. The second timer 100 for countering the operation time of the motor 98 for opening the gate 96, the limit switch 94 for detecting the water level of the reactor 40, the first timer 92, the limit switch (94) and the concentration of dissolved oxygen of the reactor (40) by inputting the respective values of the second timer (100) to control the blower (110), the pump, and the motor of the aeration device of the reactor (40). It consists of a control unit 120 for controlling the reaction time. By such an automatic control system, the operation of the pump 90 and the operation of the gate 96 for inflow of the wastewater from the flow rate adjustment tank 30 to the reaction tank 40 are automatically adjusted according to a predetermined time, Operation can be simplified by automatically controlling the dissolved oxygen concentration and the reaction time. Although not shown in detail, the imaging system 130 is a phase contrast microscope for observing the bacterium of the genus Bacillus and other protozoa and sludge in the reaction tank 40, and photographing the microorganisms observed by the phase contrast microscope. A camera for providing a video, a video set for recording a state of the microorganisms photographed by the camera, a monitor providing information on the microorganisms reproduced by the video set, and printing information on the microorganisms displayed on the monitor. For a printer or the like. Through the image system 130, the microbial state in the reaction tank 40 can be grasped and the operation problems can be quickly dealt with, thereby increasing the operating efficiency of the actual treatment plant.

The wastewater treatment method according to the present invention allows the deaeration process to proceed while flowing the effluent supplied through the flow adjusting tank 30 into the reaction chamber 40 in which Bacillus bacteria are predominant so that the sludge and the treated water are separated while the effluent is treated. do. This attenuating process is an aerobic step to remove most of the organic matter, nitrogen, and phosphorus while maintaining a slightly higher concentration of dissolved oxygen, and lower the concentration of dissolved oxygen in the state of maintaining the effluent flowing into the reactor 40 than the aerobic step While maintaining the micro-aerobic step of removing the organic matter, nitrogen, phosphorus, etc. that have not been removed in the exhalation step, the floc of the sludge in the anoxic state to be precipitated by gravity to separate the sludge and the treated water. At this time, the aeration of the aerobic step is concentrated aeration so as to be 60 to 70% of the total amount of air supplied to the reaction tank 40, the unaerobic step is to supply the air amount corresponding to 30 to 40% of the total amount of air, anoxic stage Drive in the form of supplying no air at all. And the concentration of dissolved oxygen in the aerobic step is within 0.7 ~ 1.5mg / ℓ, the non-aerobic step is to make the concentration of dissolved oxygen within 0.3 ~ 0.5mg / ℓ, the oxygen free phase of the dissolved oxygen concentration is almost 0mg The process is carried out in an attenuator mode holding / l. The progress time of the exhalation stage and the anaerobic stage of the reactor can be changed according to the conditions, and after the discharge stage is completed, the stage can be rested for a predetermined time for the sludge withdrawal if necessary until the next inflow of the wastewater.

In the present invention as described above, after the aerobic step, the food source remaining in the reaction tank is insufficient. In particular, in the anaerobic phase, where the concentration of dissolved oxygen is 0 mg / l, the aerobic bacteria are difficult to survive, but the Bacillus genus bacterium, which is an anaerobic bacterium that can survive in the absence of food source or low concentration of dissolved oxygen, is relatively predominant. . The bacterium used here is a simple bacilli-like form, and is a picogenic positive anaerobic bacterium that produces spores in an environment where growth is not suitable. The growth process of Bacillus bacteria is repeated by spore → germination → growth → division → spores. . As a method of predominantly Bacillus bacteria, if the Bacillus bacteria to maintain a certain number or more can improve the removal efficiency of organic matter, nitrogen and phosphorus can also improve the sedimentation of sludge. In addition, Bacillus bacteria have a filamentous form in the early stages of germination from spores with sufficient nutrients, and when nutrient deprivation is reached due to an increase in the number of Bacillus bacteria, the disintegration of filaments This happens and the cells form spores for their own survival. Bacillus genus bacteria, which have been spores, are germinated again in a suitable environment to become new Bacillus bacteria. In addition, various trace minerals other than silicon (Si) compounds, magnesium compounds, calcium compounds, manganese compounds, and iron compounds, which play an important role in promoting early germination and cell division of Bacillus bacteria in order to increase the population of Bacillus bacteria. By injecting a microbial activator consisting of a substance into the reaction tank can increase the number of bacteria of the genus Bacillus active. Dominant Bacillus bacteria treat sewage water by increasing the population again in the aerobic and unaerobic stages that remove most of organic matter, nitrogen and phosphorus. In particular, in the present invention, to promote the division of Bacillus bacteria and germination from spores, a microorganism active agent such as Bio-tonic sold by Daekyeong Entec is supplied to the reactor. On the other hand, when an environment that is not suitable for growth of Bacillus bacteria is created, Bacillus bacteria gradually become spores or form spores, and flocs of sludge mixed with good sedimentation spores are easily solid-liquid separated, thereby increasing the settling time. There is an advantage to keep it short. Another characteristic of Bacillus bacteria is the production of antibiotics such as bacitracin, polymyxin, tyrocidin, gramicidin, ciraulin in the course of spores, and these antibiotics do not require a separate disinfection facility by commissioning E. coli. It does not cause secondary pollution generated by adding disinfectant such as chlorine.

Generally, the method used to remove odorous substances in sewage water treatment plant is incineration or cleaning with chemicals when odor occurs at high concentrations, and adsorption and removal with activated charcoal, and with medium or low concentrations, after washing with chemicals or water. Adsorbed on activated carbon or discharged as is. Soil deodorization or biofiltration may also be used. As described above, the odorous substances are treated by various methods, but the problem of odors in livestock wastewater or manure treatment plant is emerging as the most difficult problem in the operation of the treatment plant. In the present invention, it is possible to remove the unique odorous substances in the waste water, hydrogen sulfide (H ₂ S) is a sulfur oxide (H ₂ S → S ⁰ → SO ₂ → H ₂ SO ₃₎ is not odor by bacteria in the aerobic state → H ₂ SO ₄ ) can completely solve the odorous substances generated in pretreatment, flow control tank and sludge treatment facilities. Compared to the case of installing facilities, incineration towers and adsorption towers for incineration of odorous substances in existing treatment plants and operating these facilities, it is possible to reduce costs in terms of installation costs as well as operation costs. In the wastewater treatment apparatus and method of the present invention, the sludge in the reaction tank is characterized by the sludge drawing about 2 to 4 times a year, except that the sludge is returned to the flow adjusting tank, and thus the sludge generation amount can be significantly reduced. .

The following describes an experiment using the wastewater treatment apparatus according to the present invention as described above.

In this experiment, the reactor 40 was made of iron, and the volume was 500 l after the inflow of wastewater, and the volume of sludge in the reactor 40 was 50 l after the treated water was discharged. The aeration was supplied to the oxygen supply from the blower 110 using the diffuser, the pump 90 used a metering pump, the effluent after the reaction is completed in the reaction tank 40 is discharged through the gate 96, Automatic control is performed by an automatic control system including first and second timers 92 and 100, limit switch 94, and the like.

Looking at the characteristics of the influent (urban sewage) used in this experiment, the influent BOD is 130-230 mg / l (average 180 mg / l), CODcr 180-320 mg / l (average 250 mg / l), COD _Mn 108-160 Mg / L (average 125 mg / L) and TP 5-10 mg / L (average 7 mg / L). In order to investigate the effect of such sewage on the treatment time (HRT), the influent sewage was operated for 1 year under the scale of 1.0 ~ 3.0 ton / day, and the analysis of each sample was conducted twice a week. The average value of each water quality and each driver factor value are shown in Table 1 and Table 2 below.

As shown in Tables 1 and 2, the concentrations and removal efficiencies of the treated waters operated between 4 and 12 hours of hydraulic residence time (treatment time) using the treatment process of the present invention were 7.5 to 3.6 for BOD. Mg / l, 95.9 ~ 97.9%, and the concentration and removal efficiency of treated water was 12.7 ~ 7.5mg / l, 93.7 ~ 96.3% for CODcr, and 3.5 ~ 2.5mg / l for TSS. In the case of TN, the concentration and removal efficiency of treated water were 13.8 ~ 7.8mg / l and 67.1 ~ 82.7%, respectively. In the case of TP, the concentration and removal efficiency of treated water were 1.3 ~ 0.7mg / l, respectively. , 74-90.7% were obtained. The removal efficiency of TN is about 60 ~ 70% in the case of other methods commonly used in the advanced treatment process of urban sewage treatment, and in the case of TP, the treatment efficiency of the present invention is about 70%. This is getting excellent results. In addition, the treatment time of the present invention is about 4 to 12 hours, and the removal efficiency of nitrogen and phosphorus is comparable to that of the other methods, compared with that of the other processing methods generally used in advanced processing processes. Much better results were achieved.

On the other hand, using the sewage treatment system and method according to a preferred embodiment of the present invention the results of treatment for about 6 months from July to December at a daily throughput of 5m ³ / day scale in the sanitation sanitary treatment plant is shown in Table 3 below . At this time, the treatment water quality represents only the treatment water quality for the inflow and outflow of the reaction tank 40 which is a biological treatment tank. In addition, the treatment of the manure is generally treated with activated sludge, the treatment time is usually 20 to 30 days, the intake manure is diluted, but the present invention was treated with dilution and the treatment time is 8 days Treatment was carried out under the conditions. The removal efficiency of the treated water is 98 ~ 99% for BOD, COD, SS, 97.1% for TN, and 91.9% for TP. The treatment time is compared with the treated water quality in the manure treatment plant by the conventional method. Despite this rather short, the treatment efficiency was rather high or almost the same.

Table 4 is a chart showing the results of operating at 6 hours of treatment time to compare the results of the conventional SBR method using the activated sludge microorganisms and the treated water by the wastewater treatment apparatus according to the present invention. The treated water quality and removal efficiency of the conventional SBR were 11.5 mg / l and 92.8% for BOD, 17.4 mg / l and 63.4% for TN, and 1.9 mg / l for TP, respectively. The water quality and the removal efficiency of the treated water according to the present invention were 72.9%, 96.1% for BOD, 11.6mg / l and 75.6% for TN, and 75.6% for TP. 0.8 mg / l, 88.6%. Therefore, the wastewater treatment apparatus and method according to the present invention showed excellent removal efficiency in almost all items compared to the conventional SBR method.

As described above, the wastewater treatment apparatus and method according to a preferred embodiment of the present invention have been described, but this is merely an example, and various changes and modifications can be made without departing from the spirit of the present invention. Those skilled in the art will appreciate.

According to the wastewater treatment apparatus and method according to the present invention, by improving the SBR method using a single reaction tank to predominate all Bacillus bacteria of all species to remove organic matter, nitrogen, phosphorus, etc. Odor substances generated can be removed, and treatment efficiency can be increased. In addition, it is easy to operate using an automatic control system composed of a timer, a limit switch, and the like, and an image system can observe microorganisms in a reactor and operate in an optimal state.

Claims (9)

A pretreatment facility for removing contaminants, particulates, and non-corrosive inorganic substances contained in the wastewater to be treated; An aeration device is installed and a flow rate adjusting tank for accommodating the effluent of the pretreatment facility; The aeration device is installed in a tank for culturing Bacillus bacteria, and by receiving the effluent supplied from the flow adjusting tank to adjust the concentration of dissolved oxygen to remove organic matter, nitrogen and phosphorus, and to separate sludge and treated water. A reactor for carrying out the process; An activator supply unit for dissolving microbial activators for promoting disintegration and germination of Bacillus bacteria and supplying them to the reactor; A conveying pump for conveying the sludge of the reactor to the flow rate adjusting tank; A wastewater treatment apparatus comprising a discharge tank for receiving the treated water transferred from the reaction tank and for discharging the supernatant. The method of claim 1, A sludge storage tank for drawing excess sludge of the reactor; And a dewatering unit for dewatering the sludge introduced from the sludge storage tank and discharging the sludge into the sludge cake, and transferring the filtrate generated during dewatering to the flow adjusting tank. The method according to claim 1 or 2, A first timer for countering an operation time of a pump for supplying effluent water from the flow rate adjusting tank to the reaction tank; A limit switch for detecting the level of the reactor; A second timer for counting an operation time of a motor for opening the gate to discharge the treated water of the reactor to the outside; And a controller configured to control the aeration device, the pump and the motor of the reactor by inputting respective values of the first timer, the limit switch, and the second timer to control the dissolved oxygen concentration and the reaction time of the reactor. Sewage treatment system. The method according to claim 1 or 2, Including an imaging system for continuously observing the microorganisms in the reactor, The imaging system comprises: a phase contrast microscope for observing the bacterium of the genus Bacillus and other protozoa and sludge; A camera for photographing microorganisms observed by the phase contrast microscope; A video set for recording the state of microorganisms photographed by the camera; A monitor providing information about the microorganisms reproduced by said video set; Wastewater treatment apparatus comprising a printer for printing information on the microorganisms displayed on the monitor. In the wastewater treatment method for the advanced treatment of sewage, sewage, livestock wastewater, manure, etc. containing organic matter, nitrogen and phosphorus using a single reactor, Culturing Bacillus bacteria in the reactor; Forming effluent by removing contaminants, particulates, and non-corrosive inorganic substances contained in the sewage water to be treated through a pretreatment facility; By adjusting the effluent of the pretreatment facility to a certain amount in the flow rate adjustment tank to flow into the reaction tank in which the bacteria of the Bacillus genus, the amount of air supplied to the reaction tank is gradually reduced so that the sludge and treated water as the effluent is treated. Allowing it to be separated; Dissolving and supplying a microbial active agent to promote dissolution and germination of Bacillus bacteria in the reactor; Conveying a predetermined amount of sludge from the reactor to the flow rate adjusting tank; And draining the treated water in the reaction tank to the discharge tank and discharging the upper water of the discharge tank to the outside. The method of claim 5, The attenuating process in the reactor is an aerobic step of concentrating aeration to be 60 to 80% of the total air; An aerobic step of giving up to 30 to 40% of the total air volume after the exhalation step; And an anaerobic step of supplying no air at all after the exhalation step. The method according to claim 5 or 6, The concentration of each dissolved oxygen in the aerobic step, an aerobic step and an anaerobic step is 0.7 ~ 1.5 mg / L, 0.3 ~ 0.5 mg / L, 0 mg / L waste water treatment method. The method according to claim 5 or 6, The microbial activator is a material selected from the group consisting of silicon compounds (SiO ₂ ) and magnesium compounds (MgSO ₄ ㆍ 7H ₂ O), calcium compounds (CaO), manganese compounds, iron compounds, other trace inorganic compounds Sewage Treatment Methods. The method according to claim 5 or 6, The step of returning the sludge of the reaction tank to the flow rate adjustment tank is a wastewater treatment method, characterized in that for conveying sludge of 1 to 3% of the treated flow rate.